Default Reboot itself problem

Hi guys, I got a prob, my i777 reboots alone with CM11 "Kitkat" after I lock the screen, with every rom like, SOKP, RR KK and more, but this doesnt happen with CM10.2 or Android 4.3 and below, I tried, format SD-Card, cache's, format system, preload, data, android.secure, and reinstall the rom and Gapps and everything but the prob its present. The power button its Ok. Now im with Android 4.2.2 with Resurrection 4.0.7 the last JB ROM, I hope you can help me

Thanks

PS: Maybe the Ext SD Card its the problem?? Lol, Idk but I tried everything
PHONE:Galaxy S5 G900F
ANDROID VERSION:Android 4.4.4
KERNEL VERSION: Stock CM Kernel
BASEBAND VERSION: G900FXXU1ANG8
BUILD NUMBER: PAC 4.4.4